Where do the proceeds from the Terrible Towel sales go to?

In 1996, Myron Cope, the inventor of the Terrible Towel, gave the rights to the towel to the Allegheny Valley School in Coraopolis, PA. It is a Pennsylvania school that provides care for over 900 people with mental retardation and physical disabilities. The school also includes Myron Cope's son, who is autistic.